Well, darling, if my math skills haven't failed me, the sum of those numbers is 753. So, go ahead and pat yourself on the back for asking me such a riveting question.
The mean (average) of these numbers is 70.53 to two decimal places. (The final digit is a repeating 3)
76 multiplied by 84 is 6,384.
Alright, buckle up, buttercup. The mean is 65.43, the median is 65, the mode is 56, and the range is 20. So, there you have it. Math never looked so sassy.
4, 12, 20, 28, 36, 44, 52, 60, 68, 76, 84, 92, 100
21
The average of 65 and 55 and 84 is 68
420
84
For 72 68 64 90 80 84 78 75 76 77: σ=7.4863
62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88.60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90
It is: (76+83)/2 = 79.5
28
135
75.5 approx.75.5 approx.75.5 approx.75.5 approx.
7x + 8 = 84 7x = 84 - 8 x = 76/7 x = 10.8571
They are: 62 63 64 65 66 68 69 70 72 74 75 76 77 78 80 81 82 84 85 86 87 88.
62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88.